Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Bigger Gear Ratio

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Bigger Gear Ratio

Old 11-03-22, 01:43 PM
  #1  
bh85
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Likes: 0
Liked 14 Times in 8 Posts
Bigger Gear Ratio

I have 2010 KHS CX-200. Its a nice CX bike from back in the day. Its my gravel bike, among the others. It comes with Tiagra 9 speed shifters and Tiagra front derailleur. Crankset is 9 speed FSA 46/36. Rear derailleur is 105 SS 4600. Shimano says max cog is 27t. Casette on it is 12-25. I would like to get some better gear range for climbing. What would be the cheapest option to go with. I was thinking about maybe going with Alivio M3100 9 speed and 11-36 cassette. I think it would work with 9 speed Tiagra shifters? Another option would be to replace it with new groupset, in which case I might go with Sensah SRX 1x11 with 42t crankset and 11-46 cassette. Not sure which way to go. Any help is appreciated from gurus.
bh85 is offline  
Old 11-03-22, 02:06 PM
  #2  
SurferRosa
seŮor miembro
 
SurferRosa's Avatar
 
Join Date: Dec 2018
Location: Pac NW
Posts: 6,916

Bikes: Old school lightweights

Mentioned: 78 Post(s)
Tagged: 0 Thread(s)
Quoted: 2946 Post(s)
Liked 4,252 Times in 2,261 Posts
Originally Posted by bh85 View Post
I would like to get some better gear range for climbing.
So you want "lower" gears (maybe with larger rear cogs), the opposite of "bigger gear ratio."
SurferRosa is offline  
Likes For SurferRosa:
Old 11-03-22, 02:51 PM
  #3  
bh85
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Likes: 0
Liked 14 Times in 8 Posts
Originally Posted by SurferRosa View Post
So you want "lower" gears (maybe with larger rear cogs), the opposite of "bigger gear ratio."
Yes, sorry brain wasnt working. Need some lower gears in the back. My lowest now is 25t.
bh85 is offline  
Old 11-03-22, 03:20 PM
  #4  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 5,434
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1589 Post(s)
Liked 1,316 Times in 773 Posts
Originally Posted by bh85 View Post
Yes, sorry brain wasnt working. Need some lower gears in the back. My lowest now is 25t.
OK, so all you need is any Shimano compatible "9 speed" mountain bike derailleur that can handle the sort of cassette you want to buy. Oh, and the cassette and chain of course. Shimano and Microshift both still make derailleurs that will fill your needs

Last edited by alcjphil; 11-21-22 at 10:43 AM.
alcjphil is offline  
Old 11-03-22, 03:41 PM
  #5  
bh85
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Likes: 0
Liked 14 Times in 8 Posts
Originally Posted by alcjphil View Post
OK, so all you need is any Shimano compatible "9 speed" mountain bike derailleur that can handle the sort of cassette you want to buy. Oh, and the cassette and chain of course. Shimano and Microsoft both still make derailleurs that will fill your needs
Do you think Alivio M3100 9 speed would work? Itís the newest Alivio RD that can handle 36t. Not sure if anything changed with new ones.
bh85 is offline  
Old 11-03-22, 03:48 PM
  #6  
Hondo6
Senior Member
 
Join Date: Sep 2021
Location: SW Florida, USA
Posts: 915

Bikes: Yes

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 357 Post(s)
Liked 390 Times in 271 Posts
Originally Posted by alcjphil View Post
OK, so all you need is any Shimano compatible "9 speed" mountain bike derailleur that can handle the sort of cassette you want to buy. Oh, and the cassette and chain of course. Shimano and Microsoft both still make derailleurs that will fill your needs
Sheesh - having a stranglehold on the PC software market wasn't enough for Bill Gates? He had to branch out into making bike components too?

Just kidding, alcjphil. We know you meant MicroShift.
Hondo6 is offline  
Old 11-03-22, 05:27 PM
  #7  
hokiefyd 
Senior Member
 
hokiefyd's Avatar
 
Join Date: Feb 2017
Location: Northern Shenandoah Valley
Posts: 4,012

Bikes: '18 Redline Zander, '14 Surly Pugsley, '97 GT Vantara, '97 Trek MultiTrack 750, '70 Peugeot UO-18 Mixte

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 1396 Post(s)
Liked 687 Times in 512 Posts
Originally Posted by bh85 View Post
Do you think Alivio M3100 9 speed would work? Itís the newest Alivio RD that can handle 36t. Not sure if anything changed with new ones.
It will, but I've found the Shadow style derailers like these, which don't pivot the upper pulley wheel up with cage rotation, to have sluggish shifting across the smaller sprockets of the cassette, because the chain's further away from meshing tightly with those sprockets.

Instead, I'd recommend a Deore RD-M591. It's one of the last traditional style Deore rear derailer and it's a pretty stout piece. Shimano says it will support up to 34T, but I can say from personal experience that it'll handle at least 36T.

Another option is the Alivio series RD-T4000. It's one step down from Deore in Shimano's line up and is a current production derailer. Like with the M591, it supports up to a 34T, but I run this derailer with a 40T on one of my bikes and it clears it with ease.
hokiefyd is offline  
Likes For hokiefyd:
Old 11-03-22, 05:40 PM
  #8  
Lombard
Sock Puppet
 
Lombard's Avatar
 
Join Date: Oct 2022
Location: Planet Earth
Posts: 1,230

Bikes: 2014 Cannondale Synapse Carbon, 2017 Jamis Renegade Exploit and too many others to mention.

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 753 Post(s)
Liked 656 Times in 436 Posts
Originally Posted by hokiefyd View Post
Instead, I'd recommend a Deore RD-M591. It's one of the last traditional style Deore rear derailer and it's a pretty stout piece. Shimano says it will support up to 34T, but I can say from personal experience that it'll handle at least 36T.
This is the route I would take. Deore is the workhorse of mountain bike drivetrain parts.

And yes, Shimano's limits are conservative and can usually be safely exceeded by 2 teeth. I have GS road derailleurs with limit ratings of 32T. I run 34T cassettes with no problems. Just be sure to test it in the stand first and make sure you don't bind the gears when going into the large-large combo.

Last edited by Lombard; 11-03-22 at 07:05 PM.
Lombard is offline  
Old 11-03-22, 06:44 PM
  #9  
bh85
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Likes: 0
Liked 14 Times in 8 Posts
Originally Posted by hokiefyd View Post
It will, but I've found the Shadow style derailers like these, which don't pivot the upper pulley wheel up with cage rotation, to have sluggish shifting across the smaller sprockets of the cassette, because the chain's further away from meshing tightly with those sprockets.

Instead, I'd recommend a Deore RD-M591. It's one of the last traditional style Deore rear derailer and it's a pretty stout piece. Shimano says it will support up to 34T, but I can say from personal experience that it'll handle at least 36T.

Another option is the Alivio series RD-T4000. It's one step down from Deore in Shimano's line up and is a current production derailer. Like with the M591, it supports up to a 34T, but I run this derailer with a 40T on one of my bikes and it clears it with ease.
You run t4000 with 40t? Is it 2x or 1x? What chainrings are you running?
bh85 is offline  
Old 11-05-22, 09:25 AM
  #10  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 5,434
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1589 Post(s)
Liked 1,316 Times in 773 Posts
Originally Posted by Hondo6 View Post
Sheesh - having a stranglehold on the PC software market wasn't enough for Bill Gates? He had to branch out into making bike components too?

Just kidding, alcjphil. We know you meant MicroShift.
That darned autocorrect. Fixed it
alcjphil is offline  
Old 11-07-22, 09:27 AM
  #11  
hokiefyd 
Senior Member
 
hokiefyd's Avatar
 
Join Date: Feb 2017
Location: Northern Shenandoah Valley
Posts: 4,012

Bikes: '18 Redline Zander, '14 Surly Pugsley, '97 GT Vantara, '97 Trek MultiTrack 750, '70 Peugeot UO-18 Mixte

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 1396 Post(s)
Liked 687 Times in 512 Posts
Originally Posted by bh85 View Post
You run t4000 with 40t? Is it 2x or 1x? What chainrings are you running?
It's on a fat bike right now with a 22-32-42 3x and a 12-36 cassette. It runs all combinations of that drivetrain well. I was using it in a 1x configuation (36t) with the 11-40 cassette.

It should be pretty easy to make work with a 1x. The T4000's cage is really long...in this case, I'd size the chain so that it pulls the cage forward just enough to clear the 40t sprocket...that should be it. It may be more difficult to make work with a 40t and a 2x/3x setup.

It looks like you were considering it with an 11-36 cassette and 2x...it should support that pretty well.
hokiefyd is offline  
Old 11-07-22, 09:46 AM
  #12  
wrobertdavis
Senior Member
 
wrobertdavis's Avatar
 
Join Date: Mar 2006
Location: Houston, Tx
Posts: 898

Bikes: Surly Bridge Club,Cervelo R3, Surly LHT, Miyata Triplecross setup for commuting, Miyata 914, Univega Sprint

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 11 Times in 8 Posts
Originally Posted by bh85 View Post
I have 2010 KHS CX-200. Its a nice CX bike from back in the day. Its my gravel bike, among the others. It comes with Tiagra 9 speed shifters and Tiagra front derailleur. Crankset is 9 speed FSA 46/36. Rear derailleur is 105 SS 4600. Shimano says max cog is 27t. Casette on it is 12-25. I would like to get some better gear range for climbing. What would be the cheapest option to go with. I was thinking about maybe going with Alivio M3100 9 speed and 11-36 cassette. I think it would work with 9 speed Tiagra shifters? Another option would be to replace it with new groupset, in which case I might go with Sensah SRX 1x11 with 42t crankset and 11-46 cassette. Not sure which way to go. Any help is appreciated from gurus.
Have you considered attacking this from the crankset instead? You might possibly be able to change rings to 24-38 and get an improvement in the climbing without much cost or hassle.
You would give up 3-4 mph on the top end but that should not be an issue for gravel or mountain riding.
wrobertdavis is offline  
Likes For wrobertdavis:
Old 11-10-22, 10:01 AM
  #13  
bh85
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Likes: 0
Liked 14 Times in 8 Posts
Originally Posted by wrobertdavis View Post
Have you considered attacking this from the crankset instead? You might possibly be able to change rings to 24-38 and get an improvement in the climbing without much cost or hassle.
You would give up 3-4 mph on the top end but that should not be an issue for gravel or mountain riding.
I did think about switching whole crankset to something like 46-30. Right now I have 46-36. But even with that, my RD is limited to 27t, per shimano. I would like 1:1 ratio at least. So, 30-30, or 36-36.
bh85 is offline  
Old 11-21-22, 09:49 AM
  #14  
bh85
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Likes: 0
Liked 14 Times in 8 Posts
Originally Posted by hokiefyd View Post
It will, but I've found the Shadow style derailers like these, which don't pivot the upper pulley wheel up with cage rotation, to have sluggish shifting across the smaller sprockets of the cassette, because the chain's further away from meshing tightly with those sprockets.

Instead, I'd recommend a Deore RD-M591. It's one of the last traditional style Deore rear derailer and it's a pretty stout piece. Shimano says it will support up to 34T, but I can say from personal experience that it'll handle at least 36T.

Another option is the Alivio series RD-T4000. It's one step down from Deore in Shimano's line up and is a current production derailer. Like with the M591, it supports up to a 34T, but I run this derailer with a 40T on one of my bikes and it clears it with ease.
So I ended up going with Alivio M3100 Shadow, and 11-36 casette with 46-36 crankset. Alivio is shifting smooth and works great with my set up. Originally, my 2010 KHS CX-200 came with Tiagra 2x9 with 105 SS rear derailleur, which was limited to max 27t but came with 11-25 casette, and 46-36 CX crankset. Might get a different crankset like 46-30 to get me even better low gear. But happy that I gained 11 extra teeth on the rear derailleur.
bh85 is offline  
Likes For bh85:
Old 11-21-22, 09:57 AM
  #15  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 17,123

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3790 Post(s)
Liked 2,938 Times in 1,799 Posts
Originally Posted by Hondo6 View Post
Sheesh - having a stranglehold on the PC software market wasn't enough for Bill Gates? He had to branch out into making bike components too?

Just kidding, alcjphil. We know you meant MicroShift.
Back when indexing was just becoming "the way" I use to describe component interchangeability this way. "Everything MicroSoft knows about planned obsolescence and compatibilities was learned from Shimano". Not true of course but no one misunderstood my opinion and most agreed Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.